G33 Delta Calibration Issue

Hello everyone,

I am having an issue on my Kossel Mini delta printer right now. When I do the G33 delta auto level command, the inductive sensor probes a point that is off the bed, forcing me to turn off the printer.

I am using Marlin 1.1.4 and I tried adjusting the DELTA_CALIBRATION_RADIUS, however that does not affect where the sensor probes.
I have attached my config.h file.

I do have another question, I was wondering if I need to call the g33 command in the beginning of the every print? Is it necessary to call G29 for the bed mapping at all for the delta printer?

Best,
Noah

'''
========================================================================
//============================== Delta Settings =============================
//===========================================================================
// Enable DELTA kinematics and most of the default configuration for Deltas
#define DELTA

#if ENABLED(DELTA)

// Make delta curves from many straight lines (linear interpolation).
// This is a trade-off between visible corners (not enough segments)
// and processor overload (too many expensive sqrt calls).
#define DELTA_SEGMENTS_PER_SECOND 200

// After homing move down to a height where XY movement is unconstrained
#define DELTA_HOME_TO_SAFE_ZONE

// Delta calibration menu
// uncomment to add three points calibration menu option.
// See [minow.blogspot.com]
//#define DELTA_CALIBRATION_MENU

// uncomment to add G33 Delta Auto-Calibration (Enable EEPROM_SETTINGS to store results)
#define DELTA_AUTO_CALIBRATION

// NOTE NB all values for DELTA_* values MUST be floating point, so always have a decimal point in them

#if ENABLED(DELTA_AUTO_CALIBRATION)
// set the default number of probe points : n*n (1 -> 7)
#define DELTA_CALIBRATION_DEFAULT_POINTS 3.0
#endif

#if ENABLED(DELTA_AUTO_CALIBRATION) || ENABLED(DELTA_CALIBRATION_MENU)
// Set the radius for the calibration probe points - max DELTA_PRINTABLE_RADIUS*0.869 for non-eccentric probes
#define DELTA_CALIBRATION_RADIUS 70.0 // mm
#endif

// Print surface diameter/2 minus unreachable space (avoid collisions with vertical towers).
#define DELTA_PRINTABLE_RADIUS 85.0 // mm

// Center-to-center distance of the holes in the diagonal push rods.
#define DELTA_DIAGONAL_ROD 215.0 // mm

// height from z=0 to home position
#define DELTA_HEIGHT 240.0 // get this value from auto calibrate

#define DELTA_ENDSTOP_ADJ { 0.0, 0.0, 0.0 } // get these from auto calibrate

// Horizontal distance bridged by diagonal push rods when effector is centered.
#define DELTA_RADIUS 107.0 //mm Get this value from auto calibrate

// Trim adjustments for individual towers
// tower angle corrections for X and Y tower / rotate XYZ so Z tower angle = 0
// measured in degrees anticlockwise looking from above the printer
#define DELTA_TOWER_ANGLE_TRIM { 0.0, 0.0, 0.0 } // get these values from auto calibrate

// delta radius and diaginal rod adjustments measured in mm
//#define DELTA_RADIUS_TRIM_TOWER { 0.0, 0.0, 0.0 }
//#define DELTA_DIAGONAL_ROD_TRIM_TOWER { 0.0, 0.0, 0.0 }

#endif

//===========================================================================
//============================== Endstop Settings ===========================
//===========================================================================

// @Section homing

// Specify here all the endstop connectors that are connected to any endstop or probe.
// Almost all printers will be using one per axis. Probes will use one or more of the
// extra connectors. Leave undefined any used for non-endstop and non-probe purposes.
//#define USE_XMIN_PLUG
//#define USE_YMIN_PLUG
#define USE_ZMIN_PLUG
#define USE_XMAX_PLUG
#define USE_YMAX_PLUG
#define USE_ZMAX_PLUG

// coarse Endstop Settings
#define ENDSTOPPULLUPS // Comment this out (using // at the start of the line) to disable the endstop pullup resistors

#if DISABLED(ENDSTOPPULLUPS)
// fine endstop settings: Individual pullups. will be ignored if ENDSTOPPULLUPS is defined
//#define ENDSTOPPULLUP_XMAX
//#define ENDSTOPPULLUP_YMAX
//#define ENDSTOPPULLUP_ZMAX
//#define ENDSTOPPULLUP_XMIN
//#define ENDSTOPPULLUP_YMIN
//#define ENDSTOPPULLUP_ZMIN
//#define ENDSTOPPULLUP_ZMIN_PROBE
#endif

// Mechanical endstop with COM to ground and NC to Signal uses "false" here (most common setup).
#define X_MIN_ENDSTOP_INVERTING false // set to true to invert the logic of the endstop.
#define Y_MIN_ENDSTOP_INVERTING false // set to true to invert the logic of the endstop.
#define Z_MIN_ENDSTOP_INVERTING true // set to true to invert the logic of the endstop.
#define X_MAX_ENDSTOP_INVERTING false // set to true to invert the logic of the endstop.
#define Y_MAX_ENDSTOP_INVERTING false // set to true to invert the logic of the endstop.
#define Z_MAX_ENDSTOP_INVERTING false // set to true to invert the logic of the endstop.
#define Z_MIN_PROBE_ENDSTOP_INVERTING true // set to true to invert the logic of the probe.

// Enable this feature if all enabled endstop pins are interrupt-capable.
// This will remove the need to poll the interrupt pins, saving many CPU cycles.
//#define ENDSTOP_INTERRUPTS_FEATURE

//=============================================================================
//============================== Movement Settings ============================
//=============================================================================
// @Section motion

// delta speeds must be the same on xyz
/**

Default Settings
These settings can be reset by M502
Note that if EEPROM is enabled, saved values will override these.
*/

/**

With this option each E stepper can have its own factors for the
following movement settings. If fewer factors are given than the
total number of extruders, the last value applies to the rest.
*/
//#define DISTINCT_E_FACTORS

/**

Default Axis Steps Per Unit (steps/mm)
Override with M92

X, Y, Z, E0 [, E1[, E2[, E3[, E4]]]]

*/
#define DEFAULT_AXIS_STEPS_PER_UNIT { 80, 80, 80, 484 } // default steps per unit for Kossel (GT2, 20 tooth)

/**

Default Max Feed Rate (mm/s)
Override with M203

X, Y, Z, E0 [, E1[, E2[, E3[, E4]]]]

*/
#define DEFAULT_MAX_FEEDRATE { 500, 500, 500, 25 }

/**

Default Max Acceleration (change/s) change = mm/s
(Maximum start speed for accelerated moves)
Override with M201

X, Y, Z, E0 [, E1[, E2[, E3[, E4]]]]

*/
#define DEFAULT_MAX_ACCELERATION { 9000, 9000, 9000, 10000 }

/**

Default Acceleration (change/s) change = mm/s
Override with M204
M204 P Acceleration
M204 R Retract Acceleration
M204 T Travel Acceleration
*/
#define DEFAULT_ACCELERATION 1000 // X, Y, Z and E acceleration for printing moves
#define DEFAULT_RETRACT_ACCELERATION 3000 // E acceleration for retracts
#define DEFAULT_TRAVEL_ACCELERATION 1500 // X, Y, Z acceleration for travel (non printing) moves

/**

Default Jerk (mm/s)
Override with M205 X Y Z E
"Jerk" specifies the minimum speed change that requires acceleration.
When changing speed and direction, if the difference is less than the
value set here, it may happen instantaneously.
*/
#define DEFAULT_XJERK 10.0
#define DEFAULT_YJERK 10.0
#define DEFAULT_ZJERK 10.0 // Must be same as XY for delta
#define DEFAULT_EJERK 5.0

//===========================================================================
//============================= Z Probe Options =============================
//===========================================================================
// @Section probes

//
// See [marlinfw.org]
//

/**

Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN
Enable this option for a probe connected to the Z Min endstop pin.
*/
#define Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN

/**

Z_MIN_PROBE_ENDSTOP
Enable this option for a probe connected to any pin except Z-Min.
(By default Marlin assumes the Z-Max endstop pin.)
To use a custom Z Probe pin, set Z_MIN_PROBE_PIN below.
The simplest option is to use a free endstop connector.
Use 5V for powered (usually inductive) sensors.
RAMPS 1.3/1.4 boards may use the 5V, GND, and Aux4->D32 pin:
For simple switches connect...

- normally-closed switches to GND and D32.

- normally-open switches to 5V and D32.

WARNING: Setting the wrong pin may have unexpected and potentially
disastrous consequences. Use with caution and do your homework.

*/
//#define Z_MIN_PROBE_ENDSTOP

/**

Probe Type
Allen Key Probes, Servo Probes, Z-Sled Probes, FIX_MOUNTED_PROBE, etc.
Activate one of these to use Leveling below.
*/

/**

The "Manual Probe" provides a means to do "Auto" Bed Leveling without a probe.
Use G29 repeatedly, adjusting the Z height at each point with movement commands
or (with LCD_BED_LEVELING) the LCD controller.
*/
//#define PROBE_MANUALLY

#define FIX_MOUNTED_PROBE

/**

Z Servo Probe, such as an endstop switch on a rotating arm.
*/
//#define Z_ENDSTOP_SERVO_NR 0 // Defaults to SERVO 0 connector.
//#define Z_SERVO_ANGLES {70,0} // Z Servo Deploy and Stow angles

/**

The BLTouch probe uses a Hall effect sensor and emulates a servo.
*/
//#define BLTOUCH
#if ENABLED(BLTOUCH)
//#define BLTOUCH_DELAY 375 // (ms) Enable and increase if needed
#endif

/**

Enable if probing seems unreliable. Heaters and/or fans - consistent with the
options selected below - will be disabled during probing so as to minimize
potential EM interference by quieting/silencing the source of the 'noise' (the change
in current flowing through the wires). This is likely most useful to users of the
BLTouch probe, but may also help those with inductive or other probe types.
*/
//#define PROBING_HEATERS_OFF // Turn heaters off when probing
//#define PROBING_FANS_OFF // Turn fans off when probing

// A probe that is deployed and stowed with a solenoid pin (SOL1_PIN)
//#define SOLENOID_PROBE

// A sled-mounted probe like those designed by Charles Bell.
//#define Z_PROBE_SLED
//#define SLED_DOCKING_OFFSET 5 // The extra distance the X axis must travel to pickup the sled. 0 should be fine but you can push it further if you'd like.

//
// For Z_PROBE_ALLEN_KEY see the Delta example configurations.
//

/**

Z Probe to nozzle (X,Y) offset, relative to (0, 0).
X and Y offsets must be integers.
In the following example the X and Y offsets are both positive:
#define X_PROBE_OFFSET_FROM_EXTRUDER 10
#define Y_PROBE_OFFSET_FROM_EXTRUDER 10

+-- BACK ---+

| |

L | (+) P | R <-- probe (20,20)
E | | I
F | (-) N (+) | G <-- nozzle (10,10)
T | | H

| (-) | T

| |

O-- FRONT --+

(0,0)
*/
#define X_PROBE_OFFSET_FROM_EXTRUDER -27 // X offset: -left +right [of the nozzle]
#define Y_PROBE_OFFSET_FROM_EXTRUDER -25 // Y offset: -front +behind [the nozzle]
#define Z_PROBE_OFFSET_FROM_EXTRUDER +.5 // Z offset: -below +above [the nozzle]

// X and Y axis travel speed (mm/m) between probes
#define XY_PROBE_SPEED 2000

// Speed for the first approach when double-probing (with PROBE_DOUBLE_TOUCH)
#define Z_PROBE_SPEED_FAST HOMING_FEEDRATE_Z

// Speed for the "accurate" probe of each point
#define Z_PROBE_SPEED_SLOW (Z_PROBE_SPEED_FAST / 2)

// Use double touch for probing
#define PROBE_DOUBLE_TOUCH

/**

Allen key retractable z-probe as seen on many Kossel delta printers - [reprap.org]
Deploys by touching z-axis belt. Retracts by pushing the probe down. Uses Z_MIN_PIN.
*/
//#define Z_PROBE_ALLEN_KEY

#if ENABLED(Z_PROBE_ALLEN_KEY)
// 2 or 3 sets of coordinates for deploying and retracting the spring loaded touch probe on G29,
// if servo actuated touch probe is not defined. Uncomment as appropriate for your printer/probe.

// Kossel Mini
#define Z_PROBE_ALLEN_KEY_DEPLOY_1_X 30.0
#define Z_PROBE_ALLEN_KEY_DEPLOY_1_Y DELTA_PRINTABLE_RADIUS
#define Z_PROBE_ALLEN_KEY_DEPLOY_1_Z 100.0
#define Z_PROBE_ALLEN_KEY_DEPLOY_1_FEEDRATE XY_PROBE_SPEED

#define Z_PROBE_ALLEN_KEY_DEPLOY_2_X 0.0
#define Z_PROBE_ALLEN_KEY_DEPLOY_2_Y DELTA_PRINTABLE_RADIUS
#define Z_PROBE_ALLEN_KEY_DEPLOY_2_Z 100.0
#define Z_PROBE_ALLEN_KEY_DEPLOY_2_FEEDRATE (XY_PROBE_SPEED/10)

#define Z_PROBE_ALLEN_KEY_DEPLOY_3_X Z_PROBE_ALLEN_KEY_DEPLOY_2_X * 0.75
#define Z_PROBE_ALLEN_KEY_DEPLOY_3_Y Z_PROBE_ALLEN_KEY_DEPLOY_2_Y * 0.75
#define Z_PROBE_ALLEN_KEY_DEPLOY_3_Z Z_PROBE_ALLEN_KEY_DEPLOY_2_Z
#define Z_PROBE_ALLEN_KEY_DEPLOY_3_FEEDRATE XY_PROBE_SPEED

#define Z_PROBE_ALLEN_KEY_STOW_DEPTH 20
// Move the probe into position
#define Z_PROBE_ALLEN_KEY_STOW_1_X -64.0
#define Z_PROBE_ALLEN_KEY_STOW_1_Y 56.0
#define Z_PROBE_ALLEN_KEY_STOW_1_Z 23.0
#define Z_PROBE_ALLEN_KEY_STOW_1_FEEDRATE XY_PROBE_SPEED
// Move the nozzle down further to push the probe into retracted position.
#define Z_PROBE_ALLEN_KEY_STOW_2_X Z_PROBE_ALLEN_KEY_STOW_1_X
#define Z_PROBE_ALLEN_KEY_STOW_2_Y Z_PROBE_ALLEN_KEY_STOW_1_Y
#define Z_PROBE_ALLEN_KEY_STOW_2_Z (Z_PROBE_ALLEN_KEY_STOW_1_Z-Z_PROBE_ALLEN_KEY_STOW_DEPTH)
#define Z_PROBE_ALLEN_KEY_STOW_2_FEEDRATE (XY_PROBE_SPEED/10)
// Raise things back up slightly so we don't bump into anything
#define Z_PROBE_ALLEN_KEY_STOW_3_X Z_PROBE_ALLEN_KEY_STOW_2_X
#define Z_PROBE_ALLEN_KEY_STOW_3_Y Z_PROBE_ALLEN_KEY_STOW_2_Y
#define Z_PROBE_ALLEN_KEY_STOW_3_Z (Z_PROBE_ALLEN_KEY_STOW_1_Z+Z_PROBE_ALLEN_KEY_STOW_DEPTH)
#define Z_PROBE_ALLEN_KEY_STOW_3_FEEDRATE (XY_PROBE_SPEED/2)

#define Z_PROBE_ALLEN_KEY_STOW_4_X 0.0
#define Z_PROBE_ALLEN_KEY_STOW_4_Y 0.0
#define Z_PROBE_ALLEN_KEY_STOW_4_Z Z_PROBE_ALLEN_KEY_STOW_3_Z
#define Z_PROBE_ALLEN_KEY_STOW_4_FEEDRATE XY_PROBE_SPEED

#endif // Z_PROBE_ALLEN_KEY

/**

Z probes require clearance when deploying, stowing, and moving between
probe points to avoid hitting the bed and other hardware.
Servo-mounted probes require extra space for the arm to rotate.
Inductive probes need space to keep from triggering early.
Use these settings to specify the distance (mm) to raise the probe (or
lower the bed). The values set here apply over and above any (negative)
probe Z Offset set with Z_PROBE_OFFSET_FROM_EXTRUDER, M851, or the LCD.
Only integer values >= 1 are valid here.
Example: M851 Z-5 with a CLEARANCE of 4 => 9mm from bed to nozzle.

But: `M851 Z+1` with a CLEARANCE of 2 => 2mm from bed to nozzle.

*/
#define Z_CLEARANCE_DEPLOY_PROBE 50 // Z Clearance for Deploy/Stow
#define Z_CLEARANCE_BETWEEN_PROBES 5 // Z Clearance between probe points

// For M851 give a range for adjusting the Z probe offset
#define Z_PROBE_OFFSET_RANGE_MIN -20
#define Z_PROBE_OFFSET_RANGE_MAX 20

// Enable the M48 repeatability test to test probe accuracy
//#define Z_MIN_PROBE_REPEATABILITY_TEST

// For Inverting Stepper Enable Pins (Active Low) use 0, Non Inverting (Active High) use 1
// :{ 0:'Low', 1:'High' }
#define X_ENABLE_ON 0
#define Y_ENABLE_ON 0
#define Z_ENABLE_ON 0
#define E_ENABLE_ON 0 // For all extruders

// Disables axis stepper immediately when it's not being used.
// WARNING: When motors turn off there is a chance of losing position accuracy!
#define DISABLE_X false
#define DISABLE_Y false
#define DISABLE_Z false
// Warn on display about possibly reduced accuracy
//#define DISABLE_REDUCED_ACCURACY_WARNING

// @Section extruder

#define DISABLE_E false // For all extruders
#define DISABLE_INACTIVE_EXTRUDER true // Keep only the active extruder enabled.

// @Section machine

// Invert the stepper direction. Change (or reverse the motor connector) if an axis goes the wrong way.
#define INVERT_X_DIR true // DELTA does not invert
#define INVERT_Y_DIR true
#define INVERT_Z_DIR true

// Enable this option for Toshiba stepper drivers
//#define CONFIG_STEPPERS_TOSHIBA

// @Section extruder

// For direct drive extruder v9 set to true, for geared extruder set to false.
#define INVERT_E0_DIR false
#define INVERT_E1_DIR false
#define INVERT_E2_DIR false
#define INVERT_E3_DIR false
#define INVERT_E4_DIR false

// @Section homing

//#define Z_HOMING_HEIGHT 15 // (in mm) Minimal z height before homing (G28) for Z clearance above the bed, clamps, ...
// Be sure you have this distance over your Z_MAX_POS in case.

// Direction of endstops when homing; 1=MAX, -1=MIN
// :[-1,1]
#define X_HOME_DIR 1 // deltas always home to max
#define Y_HOME_DIR 1
#define Z_HOME_DIR 1

// @Section machine

// Travel limits after homing (units are in mm)
#define X_MIN_POS -(DELTA_PRINTABLE_RADIUS)
#define Y_MIN_POS -(DELTA_PRINTABLE_RADIUS)
#define Z_MIN_POS 0
#define X_MAX_POS DELTA_PRINTABLE_RADIUS
#define Y_MAX_POS DELTA_PRINTABLE_RADIUS
#define Z_MAX_POS MANUAL_Z_HOME_POS

// If enabled, axes won't move below MIN_POS in response to movement commands.
#define MIN_SOFTWARE_ENDSTOPS
// If enabled, axes won't move above MAX_POS in response to movement commands.
#define MAX_SOFTWARE_ENDSTOPS

/**

Filament Runout Sensor
A mechanical or opto endstop is used to check for the presence of filament.
RAMPS-based boards use SERVO3_PIN.
For other boards you may need to define FIL_RUNOUT_PIN.
By default the firmware assumes HIGH = has filament, LOW = ran out
*/
//#define FILAMENT_RUNOUT_SENSOR
#if ENABLED(FILAMENT_RUNOUT_SENSOR)
#define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
#define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
#define FILAMENT_RUNOUT_SCRIPT "M600"
#endif

//===========================================================================
//=============================== Bed Leveling ==============================
//===========================================================================
// @Section bedlevel

/**

Choose one of the options below to enable G29 Bed Leveling. The parameters
and behavior of G29 will change depending on your selection.
If using a Probe for Z Homing, enable Z_SAFE_HOMING also!
AUTO_BED_LEVELING_3POINT
Probe 3 arbitrary points on the bed (that aren't collinear)
You specify the XY coordinates of all 3 points.
The result is a single tilted plane. Best for a flat bed.
AUTO_BED_LEVELING_LINEAR
Probe several points in a grid.
You specify the rectangle and the density of sample points.
The result is a single tilted plane. Best for a flat bed.
AUTO_BED_LEVELING_BILINEAR
Probe several points in a grid.
You specify the rectangle and the density of sample points.
The result is a mesh, best for large or uneven beds.
AUTO_BED_LEVELING_UBL (Unified Bed Leveling)
A comprehensive bed leveling system combining the features and benefits
of other systems. UBL also includes integrated Mesh Generation, Mesh
Validation and Mesh Editing systems. Currently, UBL is only checked out
for Cartesian Printers. That said, it was primarily designed to correct
poor quality Delta Printers. If you feel adventurous and have a Delta,
please post an issue if something doesn't work correctly. Initially,
you will need to set a reduced bed size so you have a rectangular area
to test on.
MESH_BED_LEVELING
Probe a grid manually
The result is a mesh, suitable for large or uneven beds. (See BILINEAR.)
For machines without a probe, Mesh Bed Leveling provides a method to perform
leveling in steps so you can manually adjust the Z height at each grid-point.
With an LCD controller the process is guided step-by-step.
*/
//#define AUTO_BED_LEVELING_3POINT
//#define AUTO_BED_LEVELING_LINEAR
//#define AUTO_BED_LEVELING_BILINEAR
//#define AUTO_BED_LEVELING_UBL
//#define MESH_BED_LEVELING

/**

Enable detailed logging of G28, G29, M48, etc.
Turn on with the command 'M111 S32'.
NOTE: Requires a lot of PROGMEM!
*/
//#define DEBUG_LEVELING_FEATURE

#if ENABLED(MESH_BED_LEVELING) || ENABLED(AUTO_BED_LEVELING_BILINEAR) || ENABLED(AUTO_BED_LEVELING_UBL)
// Gradually reduce leveling correction until a set height is reached,
// at which point movement will be level to the machine's XY plane.
// The height can be set with M420 Z
//#define ENABLE_LEVELING_FADE_HEIGHT

// Set the boundaries for probing (where the probe can reach).
#define DELTA_PROBEABLE_RADIUS (DELTA_PRINTABLE_RADIUS - 20)

#endif

#if ENABLED(AUTO_BED_LEVELING_LINEAR) || ENABLED(AUTO_BED_LEVELING_BILINEAR)

// Set the number of grid points per dimension.
// Works best with 5 or more points in each dimension.
#define GRID_MAX_POINTS_X 9
#define GRID_MAX_POINTS_Y GRID_MAX_POINTS_X

#define DELTA_PROBEABLE_RADIUS (DELTA_PRINTABLE_RADIUS - 23)

#define LEFT_PROBE_BED_POSITION -(DELTA_PROBEABLE_RADIUS)
#define RIGHT_PROBE_BED_POSITION DELTA_PROBEABLE_RADIUS
#define FRONT_PROBE_BED_POSITION -(DELTA_PROBEABLE_RADIUS)
#define BACK_PROBE_BED_POSITION DELTA_PROBEABLE_RADIUS

// The Z probe minimum outer margin (to validate G29 parameters).
#define MIN_PROBE_EDGE 10

// Probe along the Y axis, advancing X after each column
//#define PROBE_Y_FIRST

#if ENABLED(AUTO_BED_LEVELING_BILINEAR)

// Beyond the probed grid, continue the implied tilt?
// Default is to maintain the height of the nearest edge.
//#define EXTRAPOLATE_BEYOND_GRID

//
// Experimental Subdivision of the grid by Catmull-Rom method.
// Synthesizes intermediate points to produce a more detailed mesh.
//
//#define ABL_BILINEAR_SUBDIVISION
#if ENABLED(ABL_BILINEAR_SUBDIVISION)
// Number of subdivisions between probe points
#define BILINEAR_SUBDIVISIONS 3
#endif

#endif

#elif ENABLED(AUTO_BED_LEVELING_3POINT)

// 3 arbitrary points to probe.
// A simple cross-product is used to estimate the plane of the bed.
#define ABL_PROBE_PT_1_X 15
#define ABL_PROBE_PT_1_Y 180
#define ABL_PROBE_PT_2_X 15
#define ABL_PROBE_PT_2_Y 20
#define ABL_PROBE_PT_3_X 170
#define ABL_PROBE_PT_3_Y 20

#elif ENABLED(AUTO_BED_LEVELING_UBL)

//===========================================================================
//========================= Unified Bed Leveling ============================
//===========================================================================

#define UBL_MESH_INSET 1 // Mesh inset margin on print area
#define GRID_MAX_POINTS_X 10 // Don't use more than 15 points per axis, implementation limited.
#define GRID_MAX_POINTS_Y GRID_MAX_POINTS_X

#define _PR,A) (R) * cos(RADIANS(A))
#define _PY(R,A) (R) * sin(RADIANS(A))
#define UBL_PROBE_PT_1_X _PDELTA_PROBEABLE_RADIUS, 0) // Probing points for 3-Point leveling of the mesh
#define UBL_PROBE_PT_1_Y _PY(DELTA_PROBEABLE_RADIUS, 0)
#define UBL_PROBE_PT_2_X _PDELTA_PROBEABLE_RADIUS, 120)
#define UBL_PROBE_PT_2_Y _PY(DELTA_PROBEABLE_RADIUS, 120)
#define UBL_PROBE_PT_3_X _PDELTA_PROBEABLE_RADIUS, 240)
#define UBL_PROBE_PT_3_Y _PY(DELTA_PROBEABLE_RADIUS, 240)

#define UBL_G26_MESH_VALIDATION // Enable G26 mesh validation
#define UBL_MESH_EDIT_MOVES_Z // Sophisticated users prefer no movement of nozzle

#elif ENABLED(MESH_BED_LEVELING)

//===========================================================================
//=================================== Mesh ==================================
//===========================================================================

#define MESH_INSET 10 // Mesh inset margin on print area
#define GRID_MAX_POINTS_X 3 // Don't use more than 7 points per axis, implementation limited.
#define GRID_MAX_POINTS_Y GRID_MAX_POINTS_X

//#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS

#endif // BED_LEVELING

/**

Use the LCD controller for bed leveling
Requires MESH_BED_LEVELING or PROBE_MANUALLY
*/
//#define LCD_BED_LEVELING

#if ENABLED(LCD_BED_LEVELING)
#define MBL_Z_STEP 0.025 // Step size while manually probing Z axis.
#define LCD_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
#endif

/**

Commands to execute at the end of G29 probing.
Useful to retract or move the Z probe out of the way.
*/
//#define Z_PROBE_END_SCRIPT "G1 Z10 F12000\nG1 X15 Y330\nG1 Z0.5\nG1 Z10"

// @Section homing

// The center of the bed is at (X=0, Y=0)
#define BED_CENTER_AT_0_0

// Manually set the home position. Leave these undefined for automatic settings.
// For DELTA this is the top-center of the Cartesian print volume.
//#define MANUAL_X_HOME_POS -15
//#define MANUAL_Y_HOME_POS -15
#define MANUAL_Z_HOME_POS DELTA_HEIGHT+14.98// Distance between the nozzle to printbed after homing

// Use "Z Safe Homing" to avoid homing with a Z probe outside the bed area.
//
// With this feature enabled:
//
// - Allow Z homing only after X and Y homing AND stepper drivers still enabled.
// - If stepper drivers time out, it will need X and Y homing again before Z homing.
// - Move the Z probe (or nozzle) to a defined XY point before Z Homing when homing all axes (G28).
// - Prevent Z homing when the Z probe is outside bed area.
//
//#define Z_SAFE_HOMING

#if ENABLED(Z_SAFE_HOMING)
#define Z_SAFE_HOMING_X_POINT ((X_MIN_POS + X_MAX_POS) / 2) // X point for Z homing when homing all axis (G28).
#define Z_SAFE_HOMING_Y_POINT ((Y_MIN_POS + Y_MAX_POS) / 2) // Y point for Z homing when homing all axis (G28).
#endif

// Delta only homes to Z
#define HOMING_FEEDRATE_Z (200*25)

//==
'''

Reduce DELTA_CALIBRATION_RADIUS until the sensor hits the bed on all points. On your other question: personally I no longer use G29 at all.

I did try reducing it, however it does not have any affect on my printer. It still does goes off the bed.

reduce it even more... you can do it with M665 Bx.xx M500 or change it in the FW (don't forget to do M502 M500 to load the new value in EEPROM)